sile 0.14.8

Simon’s Improved Layout Engine
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local plain = require("classes.plain")

local class = pl.class(plain)
class._name = "bible"

if not SILE.scratch.headers then SILE.scratch.headers = {} end

class.defaultFrameset = {
  content = {
    left = "8.3%pw",
    right = "86%pw",
    top = "11.6%ph",
    bottom = "top(footnotes)"
  },
  folio = {
    left = "left(content)",
    right = "right(content)",
    top = "bottom(footnotes)+3%ph",
    bottom = "bottom(footnotes)+5%ph"
  },
  runningHead = {
    left = "left(content)",
    right = "right(content)",
    top = "top(content) - 8%ph",
    bottom = "top(content)-3%ph"
  },
  footnotes = {
    left = "left(content)",
    right = "right(content)",
    height = "0",
    bottom = "83.3%ph"
  }
}

function class:singleColumnMaster()
  self:defineMaster({
    id = "right",
    firstContentFrame = self.firstContentFrame,
    frames = self.defaultFrameset
  })
  self:loadPackage("twoside", {
    oddPageMaster = "right",
    evenPageMaster = "left"
  })
  self:loadPackage("footnotes", {
    insertInto = "footnotes",
    stealFrom = { "content" }
  })
end

function class:twoColumnMaster()
  self.firstContentFrame = "contentA"
  self:defineMaster({
      id = "right",
      firstContentFrame = "contentA",
      frames = {
        title = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "11.6%ph",
          height = "0",
          bottom = "top(contentA)"
        },
        contentA = {
          left = "8.3%pw",
          right = "left(gutter)",
          top = "bottom(title)",
          bottom = "top(footnotesA)",
          next = "contentB",
          balanced = true
        },
        contentB = {
          left = "right(gutter)",
          width ="width(contentA)",
          right = "86%pw",
          top = "bottom(title)",
          bottom = "top(footnotesB)",
          balanced = true
        },
        gutter = {
          left = "right(contentA)",
          right = "left(contentB)",
          width = self.options.gutter
        },
        folio = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "bottom(footnotesB)+3%ph",
          bottom = "bottom(footnotesB)+5%ph"
        },
        runningHead = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "top(contentA)-8%ph",
          bottom = "top(contentA)-3%ph"
        },
        footnotesA = {
          left =  "left(contentA)",
          right = "right(contentA)",
          height = "0",
          bottom = "83.3%ph"
        },
        footnotesB = {
          left = "left(contentB)",
          right = "right(contentB)",
          height = "0",
          bottom = "83.3%ph"
        },
      }
    })
  self:defineMaster({
      id = "left",
      firstContentFrame = "contentA",
      frames = {
        title = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "11.6%ph",
          height = "0",
          bottom = "top(contentA)"
        },
        contentA = {
          left = "14%pw",
          right = "left(gutter)",
          top = "bottom(title)",
          bottom = "top(footnotesA)",
          next = "contentB",
          balanced = true
        },
        contentB = {
          left = "right(gutter)",
          width = "width(contentA)",
          right = "91.7%pw",
          top = "bottom(title)",
          bottom = "top(footnotesB)",
          balanced = true
        },
        gutter = {
          left = "right(contentA)",
          right = "left(contentB)",
          width = self.options.gutter
        },
        folio = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "bottom(footnotesB)+3%ph",
          bottom = "bottom(footnotesB)+5%ph"
        },
        runningHead = {
          left = "left(contentA)",
          right = "right(contentB)",
          top = "top(contentA)-8%ph",
          bottom = "top(contentA)-3%ph"
        },
        footnotesA = {
          left = "left(contentA)",
          right = "right(contentA)",
          height = "0",
          bottom = "83.3%ph"
        },
        footnotesB = {
          left = "left(contentB)",
          right = "right(contentB)",
          height = "0",
          bottom = "83.3%ph"
        },
      }
    })
  -- Later we'll have an option for two fn frames
  self:loadPackage("footnotes", { insertInto = "footnotesB", stealFrom = { "contentB" } })
  -- self:loadPackage("balanced-frames")
end

local _twocolumns
local _gutterwidth

function class:_init(options)
  plain._init(self, options)
  self:loadPackage("masters")
  self:loadPackage("infonode")
  self:loadPackage("chapterverse")
  self:registerPostinit(function (self_)
    if self_.options.twocolumns then
      self_:twoColumnMaster()
      SILE.settings:set("linebreak.tolerance", 9000)
    else
      self_:singleColumnMaster()
    end
  end)
end

function class:endPage ()
  if (self:oddPage() and SILE.scratch.headers.right) then
    SILE.typesetNaturally(SILE.getFrame("runningHead"), function ()
      SILE.settings:set("current.parindent", SILE.nodefactory.glue())
      SILE.settings:set("document.lskip", SILE.nodefactory.glue())
      SILE.settings:set("document.rskip", SILE.nodefactory.glue())
      -- SILE.settings:set("typesetter.parfillskip", SILE.nodefactory.glue())
      SILE.process(SILE.scratch.headers.right)
      SILE.call("par")
    end)
  elseif (not(self:oddPage()) and SILE.scratch.headers.left) then
      SILE.typesetNaturally(SILE.getFrame("runningHead"), function ()
        SILE.settings:set("current.parindent", SILE.nodefactory.glue())
        SILE.settings:set("document.lskip", SILE.nodefactory.glue())
        SILE.settings:set("document.rskip", SILE.nodefactory.glue())
          -- SILE.settings:set("typesetter.parfillskip", SILE.nodefactory.glue())
        SILE.process(SILE.scratch.headers.left)
        SILE.call("par")
      end)
  end
  return plain.endPage(self)
end

function class:declareOptions ()
  plain.declareOptions(self)
  self:declareOption("twocolumns", function(_, value)
    if value then
      _twocolumns = value
    end
    return _twocolumns
  end)
  self:declareOption("gutter", function(_, value)
    if value then
      _gutterwidth = value
    end
    return _gutterwidth
  end)
end

function class:setOptions (options)
  options.twocolumns = options.twocolumns or false
  options.gutter = options.gutter or "3%pw"
  plain.setOptions(self, options)
end

function class:registerCommands ()

  plain.registerCommands(self)

  self:registerCommand("left-running-head", function (_, content)
    local closure = SILE.settings:wrap()
    SILE.scratch.headers.left = function () closure(content) end
  end, "Text to appear on the top of the left page")

  self:registerCommand("right-running-head", function (_, content)
    local closure = SILE.settings:wrap()
    SILE.scratch.headers.right = function () closure(content) end
  end, "Text to appear on the top of the right page")

  self:registerCommand("chapter", function (options, content)
    local ch = options.id:match("%d+")
    SILE.call("bible:chapter-head", options, {"Chapter " .. ch})
    SILE.call("save-chapter-number", options, {options.id})
    SILE.process(content)
  end)

  self:registerCommand("verse-number", function (options, content)
    SILE.call("indent")
    SILE.call("bible:verse-number", options, content)
    SILE.call("save-verse-number", options, content)
    SILE.call("left-running-head", {}, function ()
      SILE.settings:temporarily(function ()
        SILE.settings:set("document.lskip", SILE.nodefactory.glue())
        SILE.settings:set("document.rskip", SILE.nodefactory.glue())
        -- SILE.settings:set("typesetter.parfillskip", SILE.nodefactory.glue())
        SILE.call("font", { size = "10pt", family = "Gentium" }, function ()
          SILE.call("first-reference")
          SILE.call("hfill")
          SILE.call("font", { style = "italic" }, SILE.scratch.theChapter)
        end)
        SILE.typesetter:leaveHmode()
      end)
    end)
    SILE.call("right-running-head", {}, function ()
      SILE.settings:temporarily(function ()
        SILE.settings:set("document.lskip", SILE.nodefactory.glue())
        SILE.settings:set("document.rskip", SILE.nodefactory.glue())
        SILE.settings:set("typesetter.parfillskip", SILE.nodefactory.glue())
        SILE.call("font", { size = "10pt", family = "Gentium" }, function ()
          -- SILE.call("font", { style = "italic" }, SILE.scratch.theChapter)
          SILE.call("hfill")
          SILE.call("last-reference")
        end)
        SILE.typesetter:leaveHmode()
      end)
    end)
  end)

end

return class